As water rises, locals use a makeshift pedestrian bridge to help them supply and evacuate in the Hunza River Valley in northern Pakistan.

巴基斯坦北部罕萨河谷，由于水势上涨，当地人利用一座临时搭建的桥帮助他们获取给养和疏散人员。

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The working processes of the frequency-tracking phase-shift PWM controlled full bridge power supply load series resonant type DBD ozone generation power system are analyzed.

系统的分析了频率跟踪移相PWM控制全桥供电的串联谐振负载式DBD型臭氧发生器电源系统的工作过程。

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A half bridge switching mode power supply (SMPS) based on PWM technology is introduced.

介绍了一款基于PWM技术的半桥式开关稳压电源。

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Such sanctions can also be undermined by so-called "foreign availability" (or the ability of other foreign companies to step in and supply the same product) and constrain potentially useful people-to-people contact and other forms of bridge-building with potential adversaries or competitor nations.

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